Online PHP editor | output for L1Ki3

<?php interface Foo { public function doSomething(string $param1); } class Bar implements Foo { public function doSomething(string $param1) { echo "Bar: " . $param1; } } class Baz implements Foo { // Using a named parameter different from Foo's signature public function doSomething(string $paramName) { echo "Baz: " . $paramName; } } function processFoo(Foo $foo) { $foo->doSomething(param1: "Test"); } $bar = new Bar(); $baz = new Baz(); processFoo($bar); // Works fine processFoo($baz); // Fatal error: